what happens to the actual iCloud storage content if subscribe to Apple One
I have read on the FAQ regarding what happens to existing iCloud storage 'plan' if subscribing to Apple One w/iCloud storage, but nowhere does it mention what happens to the actual *content* stored on existing iCloud storage.... it states: "During the free trial, you keep both your current iCloud storage plan and the iCloud storage in Apple One. Once the trial is finished, your current iCloud storage plan is canceled. Your total iCloud storage will be the amount included in your Apple One subscription."
So when the 'current iCloud storage plan is canceled' how can i be sure the CONTENT stored there (and it's also already a family sharing of 2TB) is 'transferred to' or 'available on' the new iCloud storage in Apple One?